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What is the memory consumption of an object in Java?
...
Mindprod points out that this is not a straightforward question to answer:
A JVM is free to store data any way it pleases internally, big or little endian, with any amount of padding or overhead, though primitives must behave as if ...
Draw a perfect circle from user's touch
...it is not that hard to implement a simple, but yet useful solution without introducing all that complexity. (Please don't get me wrong, for any serious purpose it is better to use some mature and proven to be stable framework).
I will present my results first and then explain the simple and straigh...
Single vs double quotes in JSON
...08565','name':'xyz','description':'can control TV\'s and more'})
Step 1: convert the incoming string into a dictionary using ast.literal_eval()
Step 2: apply json.dumps to it for the reliable conversion of keys and values, but without touching the contents of values:
>>> import ast
>&...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...学习应该从打印"Hello, world"开始。在Swift，就是一行:
println("Hello, world")
如果你写过C或Objective-C代码，这个语法看起来很熟悉，在Swift，这就是完整的程序了。你无需导入(import)一个单独的库供输入输出和字符串处理。全局范...
ActiveRecord OR query
...zation and make your queries DB agnostic. The only overhead is where Rails converts the syntax to SQL query. And it is just a matter of milliseconds. Ofcourse you should write the best performant SQL query and try to convert it to ActiveRecord syntax. If the SQL cannot be represented in ActiveRecord...
How to Resize a Bitmap in Android?
...
import android.graphics.Matrix
public Bitmap getResizedBitmap(Bitmap bm, int newWidth, int newHeight) {
int width = bm.getWidth();
int height = bm.getHeight();
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// CREATE A MATRIX FO...
Determining the size of an Android view at runtime
...nually:
view.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
int width=view.getMeasuredWidth();
int height=view.getMeasuredHeight();
If you know the size of the container:
val widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(maxWidth, View.MeasureSpec.AT_MOST)
val heigh...
How to get the last date of a particular month with JodaTime?
...t when I was looking for this.
If someone needs the actual last day as an int instead using JodaTime you can do this:
public static final int JANUARY = 1;
public static final int DECEMBER = 12;
public static final int FIRST_OF_THE_MONTH = 1;
public final int getLastDayOfMonth(final int month, f...
What does “O(1) access time” mean?
...ill take twice the time. You probably don't want to put a million objects into one of these.
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Equivalent C++ to Python generator pattern
...signed, unsigned>;
using reference = value_type const&;
using pointer = value_type const*;
using difference_type = ptrdiff_t;
// C++03 (explicit aliases)
typedef std::input_iterator_tag iterator_category;
typedef std::pair<unsigned, unsigned> value_type;
typedef value_typ...